21532413124 has 6 divisors (see below), whose sum is σ = 37681722974. Its totient is φ = 10766206560.

The previous prime is 21532413121. The next prime is 21532413127. The reversal of 21532413124 is 42131423512.

It is an interprime number because it is at equal distance from previous prime (21532413121) and next prime (21532413127).

It can be written as a sum of positive squares in only one way, i.e., 12136988224 + 9395424900 = 110168^2 + 96930^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21532413092 and 21532413101.

It is not an unprimeable number, because it can be changed into a prime (21532413121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2691551637 + ... + 2691551644.

Almost surely, 2^21532413124 is an apocalyptic number.

It is an amenable number.

21532413124 is a deficient number, since it is larger than the sum of its proper divisors (16149309850).

21532413124 is a wasteful number, since it uses less digits than its factorization.

21532413124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383103285 (or 5383103283 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

Adding to 21532413124 its reverse (42131423512), we get a palindrome (63663836636).

The spelling of 21532413124 in words is "twenty-one billion, five hundred thirty-two million, four hundred thirteen thousand, one hundred twenty-four".